Caitanya-caritāmṛta 5.152
kṛṣṇa-avatāre jyeṣṭha hailā sevāra kāraṇa kṛṣṇake karāila nānā sukha āsvādana
[krishna-avataare jyeshtha hailaa sevaara kaarana krishnake karaaila naanaa sukha aasvaadana]
Blended reading (Sanskrit + English inline)
kṛṣṇa-avatāre jyeṣṭha hailā sevāra kāraṇa kṛṣṇake karāila nānā sukha āsvādana
When Lord Kṛṣṇa appeared, He [Balarāma] became His elder brother to serve Him to His heart’s content and make Him enjoy all sorts of happiness.
My note
Source: vedabase.io